ganglion cyst

ganglion cyst

2. Not a cyst; GCs correspond to mucoid degeneration of tendinous tissue and are often located on the wrist in middle-aged ♀, and cause carpal tunnel syndrome, see there.

gan·gli·on cyst

(gang'glē-ŏn sist)

Collection of fluid or benign tumor mass within tendons of the wrist or ankle, most commonly on the dorsal aspect of the wrist.

cyst

(sist) [Gr. kystis, bladder, sac]

1. A closed sac or pouch with a definite wall, containing fluid, semifluid, or solid material. It is usually an abnormal structure resulting from developmental anomalies, obstruction of ducts, or parasitic infection.

2. In biology, a structure formed by and enclosing certain organisms in which they become inactive, such as the cyst of certain protozoans or of the metacercariae of flukes.

adventitious cyst

A cyst formed around a foreign body.

alveolar cyst

Dilation and rupture of pulmonary alveoli to form air cysts.

apical cyst

A cyst near the apex of the root of a nonvital tooth.

arachnoid cyst

An abnormal collection of cerebrospinal fluid within the arachnoid membrane. The cysts may compress nearby structures within the brain. In infants, they may cause headaches, altered mental status, learning disabilities, or enlargement of the head. In adults, they are an occasional cause of epilepsy.

Boyer cyst

cervical cyst

chocolate cyst

An ovarian cyst with darkly pigmented gelatinous contents.

colloid cyst

A cyst with gelatinous contents.

complex cyst

A cyst that consists of solid material and fluid-filled cavities; it may have walls of tissue inside it or internal echoes. When a complex cyst is identified on ultrasound, surgical removal is generally indicated to exclude malignancy.

congenital cyst

A cyst present at birth and resulting from abnormal development, such as a dermoid cyst, imperfect closure of a structure as in spina bifida cystica, or nonclosure of embryonic clefts, ducts, or tubules, such as cervical cysts.

daughter cyst

A cyst growing out of the walls of another cyst.

dental cyst

A cyst that forms from any of the odontogenic tissues.

dentigerous cyst

A fluid-filled, epithelial-lined cyst usually surrounding the crown of a tooth that is erupting or has not yet erupted. The tooth normally erupts through the cyst without treatment. Synonym: eruption cyst; follicular cyst; follicular odontoma

dermoid cyst

1. An ovarian teratoma.

2. A nonmalignant cystic tumor containing elements derived from the ectoderm, such as hair, teeth, or skin. These tumors occur frequently in the ovary but may develop in other organs such as the lungs.

distention cyst

A cyst formed in a natural enclosed cavity, such as a follicular cyst of the ovary.

ganglion cyst

Gartner cyst

Gorlin cyst

hydatid cyst

A cyst formed by the growth of the larval form of Echinococcus granulosus, usually in the liver. Synonym: echinococcus cyst

implantation cyst

A cyst resulting from displacement of portions of the epidermis, as may occur in injuries.

intraligamentary cyst

A cystic formation between the layers of the broad ligament.

involutional cyst

A cyst occurring in the normal involution of an organ or structure, as in the mammary gland.

keratin cyst

A cyst containing keratin.

cysts of liver

Simple cysts, usually small and single; or hydatid cysts; or cysts associated with cystic disease of the liver, a rare condition usually associated with congenital cystic kidneys. See: Echinococcus granulosus; hydatid

meibomian cyst

meniscus cyst

A fluid-filled cyst often associated with a degenerative horizontal meniscal tear, more frequently seen in the lateral meniscus of the knee. This ganglion-like cyst may present with a palpable mass at the joint line of the knee and can be visualized by magnetic resonance imaging.

morgagnian cyst

Morgagni cyst

mother cyst

mucous cyst

nabothian cyst

A cyst caused by closure of the ducts of the nabothian glands in the uterine cervix as a result of chronic cervicitis.

odontogenic cyst

A cyst associated with the teeth, such as a dentigerous or radicular cyst.

ovarian cyst

A fluid-filled cyst that develops in the ovary and consists of one or more chambers. The main types of cysts are follicular cysts, the corpus luteum, teratoma, and endometrioma. The patient's primary complaint is generally pelvic pain or pain during intercourse. The cysts may be palpated during bimanual examination but are diagnosed by ultrasound. Many cysts resolve spontaneously. Although nonmalignant, the cyst may have to be removed surgically because of twisting of the pedicle, which causes gangrene, or because of pressure.

parovarian cyst

periapical cyst

pilar cyst

An epithelial cyst with a wall that resembles the follicular epithelium. It is filled with a homogeneous mixture of keratin and lipid.

Synonym: trichilemma cyst

pilonidal cyst

A cyst most often in the sacrococcygeal region, usually at the upper end of the intergluteal cleft. It is due to a developmental defect that permits epithelial tissue to be trapped below the skin or may be acquired. This type of cyst may become symptomatic in early adulthood when an infected draining sinus forms.

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